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JAMB Chemistry 2013 Question 18

Question 18

Mole Concept and Stoichiometry

10.0 dm3 of water was added to 2.0 mol dm−3 of 2.5dm3 solution of HCl. What is the concentration of the final solution in mol dm−3?

  1. A.0.4
  2. B.8.0
  3. C.2.0
  4. D.0.5
Show the answer and explanation

Answer: A (0.4)

Explanation

C1V1 = C2V2: 2.0 × 2.5 = C2 × 12.5, so C2 = 0.4 mol dm−3.